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Welfare, performance and emissions in a stationary housing system for organic growing-finishing pigs

a holistic approach

Olsson, Anne-Charlotte (2016). Welfare, performance and emissions in a stationary housing system for organic growing-finishing pigs. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2016:76
ISBN 978-91-576-8654-1
eISBN 978-91-576-8655-8
[Doctoral thesis]

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Abstract

High standards of animal welfare and health and providing animals with a natural environment and organic feed are primary objectives in organic pig farming. However, housing solutions in organic pig farming are not uniform. Stationary systems have permanent buildings with concrete areas outdoors and/or pasture, mobile systems have outdoor huts on pasture, and mixed systems have both stationary buildings and huts. This thesis examined the pros and cons of stationary housing systems for organic growing-finishing pigs in studies carried out at Odarslöv Research Farm, SLU, Alnarp. The uninsulated and naturally ventilated building was fitted with eight pens (8 x 16= 128 pigs), four with a deep straw system and four with a ‘straw-flow’ system. Each pen had access to an outdoor concrete area and, depending on the experimental set up, also to pasture.

No difference in health, daytime pig activity, or pen hygiene was detected between the deep straw and straw-flow systems. Pigs with access to pasture were not more active during daytime behaviour studies than pigs without access to pasture. However, the pigs with access to pasture occupied themselves more on the pasture than on the concrete outdoor area. Pigs from straw-flow pens had higher carcass meat percentage at slaughter than pigs from deep straw pens, but there was no difference in performance between pigs with and pigs without access to pasture. Nitrogen losses from the organic pigs were estimated to be 26-27% of N excreted. This gives approximately three to four times higher ammonia emission than standard values from conventional pigs when assuming that all losses consist of ammonia. A larger fouled area, particularly outdoors, may partly explain this result.

Measures to improve hygiene, reduce fouling and decrease nitrogen emissions from the outdoor concrete area were tested. The intention was to direct the excretory behaviour of the pigs by introducing rooting yards with attractive rooting material. Our investigations on rooting yard design revealed that a larger rooting yard (8.4 m2) with one high wall (LH) was a more optimal option than a smaller (5.3 m2) one. In the LH design it was revealed that any rooting material of wood shavings, peat, peat + feed pellets was more attractive than the control yard without rooting material. Visual hygiene evaluations showed improved hygiene for all rooting materials tested. However, to reduce ammonia emission, peat was clearly in favour compared to wood shavings.

Authors/Creators:Olsson, Anne-Charlotte
Title:Welfare, performance and emissions in a stationary housing system for organic growing-finishing pigs
Subtitle:a holistic approach
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2016
Depositing date:18 August 2016
Volume:2016:76
Number of Pages:76
Papers/manuscripts:
NumberReferences
IBotermans, J.A.M., Olsson, A.-C., Andersson, M., Bergsten, C., Svendsen, J., 2015. Performance, health and behaviour of organic growing-finishing pigs in two different housing systems with or without access to pasture. Acta Agric. Scand. Sect. A- Anim. Sci. 65, 158–167.
IIOlsson, A.-C., Jeppsson, K.-H., Botermans, J., von Wachenfelt, H., Andersson, M., Bergsten, C., Svendsen, J., 2014. Pen hygiene, N, P and K budgets and calculated nitrogen emission for organic growing–finishing pigs in two different housing systems with and without pasture access. Livest. Sci. 165, 138–146.
IIIOlsson, A.-C., Botermans, J., Andersson, M., Jeppsson, K.-H., Bergsten, C., 2016. Design of rooting yards for better hygiene and lower ammonia emissions within the outdoor concrete area in organic pig production. Livest. Sci. 185, 79–88.
IVOlsson, A.-C., Botermans, J., Andersson, M., Jeppsson, K., 2016a. Use of different rooting materials to improve hygiene and to lower ammonia emission within the outdoor concrete area in organic growing fi nishing pig production Dunging area Eating / activity area Lying area. Livest. Sci. 191, 64–71.
Place of Publication:Alnarp
Publisher:Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SLU/LTJ - Partnership Alnarp
SLU - Agricultural Sciences for Global Development > Land use and climate change
SLU - Agricultural Sciences for Global Development > Efficiency in farming systems
ISBN for printed version:978-91-576-8654-1
ISBN for electronic version:978-91-576-8655-8
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L01 Animal husbandry
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Agrovoc terms:swine, organic husbandry, animal housing, piggeries, animal housing, ammonia, emission
Keywords:organic pigs, stationary housing, ammonia emission, mass balance
URN:NBN:urn:nbn:se:slu:epsilon-e-3610
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3610
ID Code:13579
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(LTJ, LTV) > Department of Biosystems and Technology (from 130101)
(VH) > Department of Biosystems and Technology (from 130101)
External funders:FORMAS
Deposited By: Anne-Charlotte Olsson
Deposited On:19 Aug 2016 11:37
Metadata Last Modified:11 Oct 2017 10:55

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